The Numerical Study of Liquid-Gas Ejection Performance Driven by Libr Aqueous Solution

Lithium bromide refrigeration technique is widely used in central air-conditioning refrigeration technology because it can make use of low-grade heat, and refrigerant is safe and environmentally friendly. This paper is based on the purpose that improving the mass transfer efficiency by applying the liquid-gas ejector to the lithium bromide refrigeration machine. Meanwhile, the numerical simulation is adopted to discuss the influence rule of the injection effect caused by the structure's size of the liquid-gas ejector. These can offer reference for optimization design of liquid-gas ejector. The result of simulation indicates that if the structure's parameters of the ejector are still, the vapor's mass flow rate will increase with the augment of the lithium bromide solution's inlet velocity. Furthermore, with certain lithium bromide solution's inlet velocity, the area ratio of diffuser's throatsection and nozzle outlet section has dramatically affection on the injection effect. Vapor's mass flow rate will decrease with the augment of diffuser's exit diameter. The shorter the diffuser's mixer is, the better the injection effect would be. When the length of the mixer is zero, the injection effect is the best.